From what were the fowls created?

From the waters.

And God said, Let the waters bring forth abundantly the moving
creature that hath life, and fowl that may fly above the earth in
the open firmament of heaven. And God created great whales, and every
living creature that moveth, which the waters brought forth abundantly,
after their kind, and every winged fowl after his kind: and God saw
that it was good. Genesis 1:20-21

From the ground.

And out of the ground the LORD God formed every beast of the field, and
every fowl of the air; and brought them unto Adam to see what he would call
them: and whatsoever Adam called every living creature, that was the name
thereof. Genesis 2:19